Claude Code suggests non-existent "fan out subagents" command

Summary

Claude Code suggested I try a command phrased like "fan out subagents — claude code will dig deep". No such slash command exists. The phrase appears to be a hallucinated command name based on the real "fan-out subagents" pattern described in Anthropic's docs/webinars.

Expected

Claude Code should either:

• Reference the pattern descriptively ("I can spawn subagents in parallel to investigate X, Y, Z") without quoting it as a runnable command, or
• Point to a real mechanism (custom slash commands in .claude/commands/, or just asking the model to issue parallel Agent calls).

Actual

The CLI surfaced text like "try 'fan out subagents', claude code will dig deep", implying a built-in command. There is no /fan-out-subagents command, no skill by that name in the default install, and no entry in ~/.claude/commands/. Verified against:

• https://docs.anthropic.com/en/docs/claude-code/sub-agents
• https://resources.anthropic.com/hubfs/Claude%20Code%20Advanced%20Patterns_%20Subagents,%20MCP,%20and%20Scaling%20to%20Real%20Codebases.pdf

The docs describe fan-out as a pattern users implement via custom slash commands or parallel Agent invocations, not as a shipped command.

Impact

Misleading suggestions erode trust — users try a command that doesn't exist, get confused, and have to verify against docs.

Environment

• Claude Code on Windows 11 (PowerShell)
• Model: Claude Opus 4.7